Check out the companies making the biggest moves midday: Valmont Industries — Shares of the agricultural product and infrastructure company rallied 12% on better-than-expected results for the first quarter. The company cited strong demand in its North America utility business for the beat. It also hiked the lower end of its full-year earnings guidance. Pitney Bowes — Shares of the mailing equipment and services giant popped 8% after the company posted preliminary results for the first quarter. First-quarter revenue of $477 million was above a FactSet consensus of $465.9 million, while adjusted earnings per share of around 47 cents were also above estimates. OFG Bancorp — The Puerto Rico-based financial services company’s stock jumped more than 5% after strong first-quarter results. OFG’s total core revenue grew to $185.8 million in the first quarter from $178.3 million a year ago. With solid trends, the company said it was continuing to buy back shares and it boosted its dividend by 17% during the quarter. Robert Half — The staffing company’s stock rose 4% after William Blair upgraded shares to to outperform from market perform, saying the valuation is “too compelling to ignore.” UnitedHealth — Sh …
